Script to update once a week all docker images before updating containers

download_all_dockers_v2.sh

#!/bin/bash

declare -A docker_array

# Customize your own list... hereunder are some of mines
docker_array[linuxserver/radarr]=linuxserver-radarr1
docker_array[linuxserver/jackett]=linuxserver-jackett1
docker_array[linuxserver/sonarr]=linuxserver-sonarr1
docker_array[linuxserver/tautulli]=linuxserver-tautulli1

stop=0
tobestopped_docker_file=/volume1/tools/Docker/tobestopped_docker_file.txt

if [ $# -eq 1 ]; then
	stop=1
fi

echo "Stop = $stop"

# Download
for key in "${!docker_array[@]}"; do
	# echo "** $key **"
    updated_docker="$(docker pull "$key" | tee /dev/stdout)"
	if [[ $updated_docker == *"Downloaded newer image for"* ]]; then 
		echo "Newer version : --$key--"
		if [ $stop -eq 1 ]; then
			docker stop ${docker_array[$key]} > /dev/null 2>&1
			echo "   -> Docker stopped.."
			# Remove the line because stopped 
			sed -i "\|$key|d" $tobestopped_docker_file
		else 
			# Remove to make sure line is not duplicated
			sed -i "\|$key|d" $tobestopped_docker_file
			echo "$key" >> $tobestopped_docker_file
		fi 
	fi
done

sed -i '/^$/d' $tobestopped_docker_file

if [ $stop -eq 1 ]; then
	# Loop over remaning dockers to stop 
	while IFS="" read -r key || [ -n "$key" ]
	do
		echo "Stopping : --$key--"
		docker stop ${docker_array[$key]} > /dev/null 2>&1
		echo "   -> Docker stopped.."
		sed -i "\|$key|d" $tobestopped_docker_file
	done < $tobestopped_docker_file
fi

if [ -s "$tobestopped_docker_file" ]; then
	echo "Docker that needs to be stopped and restarted :"
	cat $tobestopped_docker_file
fi